C++ code for: Write a program to print a histogram of the frequencies of different characters in its input.

Question

Hi everybody. I ask this because this question (Exercise 1-14 from Kernighan - Richie's C book) is making me suffer. It gives you the following program, so the only thing left is adding the histogram (which, I have no idea how to).

#include <stdio.h>
main( )
{
int c, i, nwhite, nother;
int ndigit[10];
nwhite = nother = 0;
for (i = 0; i < 10; ++i)
ndigit[i] = 0;

while ((c=getchar( ))!=EOF)
if (c >= '0' && c <= '9')
++ ndigit [c-'0'];
else if (c==' ' || c=='\n' || c=='\t')
++nwhite;
else
++nother;
printf ("digits =");
for (i = 0; i < 10; ++i)
printf(" %d", ndigit[i]);
printf(", blank spaces = %d, other = %d\n", nwhite, nother);
i=0;
}

So.. this program count the frecuency of each of the digits you type (from 0 to 9), the # of blank spaces and other characters. I don't care about the later two. I just want help about the creation of an histogram using the frecuencies of the numbers you type.

(Maybe this book is too old and I should know more recent/useful functions, like cin in exchange of getchar().. I dunno. Someone help me :'( )

Answer 1

To start with, you could try a simple character based graph(maybe vertical rather than horizontal)
A ****
B *******
C **
..
( that would be in line with whst was done when that book was first published, and nice graphs were not as popular as now :-))

Answer 2

The code is written in C, not C++. Take note that C and C++ are different.

Hope this would help:
https://code.sololearn.com/cAnMmhIOBWpp/#c